Finding the Fourth Proportional to 1,359.83, 1,876.65 and 770.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.83 : 1,876.65 = 770.47 : x
2. Step 2: Convert to fraction form
   1,359.83/1,876.65 = 770.47/x
3. Step 3: Cross multiply
   1,359.83x = 1,876.65 × 770.47
4. Step 4: Simplify right side
   1,359.83x = 1,445,902.53
5. Step 5: Solve for x
   x = 1,445,902.53/1,359.83
6. Step 6: Final answer
   x = 1,063.30